I'm creating the bonus stages of sf2, just to study how to customize the platform object and especially the physical environment.
It seemed easy to create the bonus level of oil drums, but it's not at all.
The problem with the platform object is the fact that when it overlaps with the obstacle, the y-speed increases upwards and the object stops only when it reaches the surface of the obstacle.
The problem with physical movement is that I only have to drop objects straight down, which doesn't make the sf2 bonus level not very original.
The movement of the oil drums should be customized with the alterable values and the x and y coordinates.
Download here.